Testing continuity with downlighters

johntom · Mar 10, 2009

Hi
just wanted to check something with you guys.
If you tested R1 + R2 on seperate a 6a lighting circuit with just selv downlighters (using a temp link in the cu), where would you take the reading from ?

Spudnik · Mar 10, 2009

Same as always at the furthest point.

If there are many downlights throughout the building i expect the circuits will be terminated at the switches, which would make things a little easier.

Good luck!

Guest123 · Mar 10, 2009

As said, furthest point of the 230V circuit.

Mr Mark Sparks · Mar 10, 2009

hi jontom are you asking because of the selv fittings because the cpcs should be continuos to( as jason and lenny said the furthest point) try to find last transformer

johntom · Mar 10, 2009

Hi
yes because of the transformers, presumably you would you have to test at the end of the T&E (instead of the normal cpc / switch live inside the ceiling rose) otherwise no cpc / R2 in the downlighter fitting from the transformer?

Mr Mark Sparks · Mar 11, 2009

yep wherever you think the last point is remember all mains circs should carry cpc

old dog · Mar 11, 2009

hi i always test at the last light ( furthest point ) there is nothing wrong in testing at the switch
in the new gn3 it shows ( R1+R2) being taken from the switch

WB Scott · Mar 14, 2009

Testing at the last point is fine, if you only have single points in each room, But when you come to Spots you need to prove that each Spot circuit has earth to the end of its run, So in effect, test at the very last point of the circuit, but if another room has downlighters in you should also test at the last point in that downlight set up. Doe's that make sense??

Im effect when fitting downlighter in multiple rooms Your Spurring off a Radial circuit, So CPC should be checked at the end of each 'spur'.